Linux Kernel: Use-After-Free (CVE-2024-26866)
Published Last modified Sources: SUSE, BSI, EUVD, CVE.org
What is affected, what to do
In the Linux kernel, the following vulnerability has been resolved: spi: lpspi: Avoid potential use-after-free in probe() fsl_lpspi_probe() is allocating/disposing memory manually with spi_alloc_host()/spi_alloc_target(), but uses devm_spi_register_controller(). In case of error after the latter call the memory will be explicitly freed in the probe function by spi_controller_put() call, but used afterwards by "devm" management outside probe() (spi_unregister_controller() <- devm_spi_unregister() below).
Update Linux Kernel to version 6.1.191, Linux Kernel to version 6.6.23, Linux Kernel to version 6.7.11.
- Affected
- Linux Kernel
lt 4.10..6.1.191 - Linux Kernel
lt 6.2..6.6.23 - Linux Kernel
lt 6.7..6.7.11 - Linux Kernel
lt 6.8..6.8.2
- Linux Kernel
- Fixed in
- Linux Kernel
6.1.191 - Linux Kernel
6.6.23 - Linux Kernel
6.7.11 - Linux Kernel
6.8.2 - Linux Kernel
6.9
- Linux Kernel
Not sure whether and how you are affected? Ask a question about this vulnerability
Metrics
5.5
XIEM Effective CVSS
Highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
5.5
CVSS v3
Severity Medium on the scale from 0 to 10.
Source: SUSE, BSI, EUVD, CVE.org
0.2 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 12.1
Show all metrics
- Severity
- Medium
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 33.52 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 5.5 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 5.5
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 0.2 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 12.1
- Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
- CISA assessment (SSVC)
- Exploitation: none known · not automatable · Technical impact: partial
- Source: CISA Vulnrichment, as of 28 May 2024
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
In the Linux kernel, the following vulnerability has been resolved: spi: lpspi: Avoid potential use-after-free in probe() fsl_lpspi_probe() is allocating/disposing memory manually with spi_alloc_host()/spi_alloc_target(), but uses devm_spi_register_controller(). In case of error after the latter call the memory will be explicitly freed in the probe function by spi_controller_put() call, but used afterwards by "devm" management outside probe() (spi_unregister_controller() <- devm_spi_unregister() below). Unable to handle kernel NULL pointer dereference at virtual address 0000000000000070 ... Call trace: kernfs_find_ns kernfs_find_and_get_ns sysfs_remove_group sysfs_remove_groups device_remove_attrs device_del spi_unregister_controller devm_spi_unregister release_nodes devres_release_all really_probe driver_probe_device __device_attach_driver bus_for_each_drv __device_attach device_initial_probe bus_probe_device deferred_probe_work_func process_one_work worker_thread kthread ret_from_fork
Source: suse_csaf, BSI CSAF, BSI WID Portal, ENISA EUVD, cvelistv5, NVD (NIST)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| Linux | Linux |
|
|
Vendors and products
Affected operating systems
| Linux | linux | linux_kernel | — |
References & sources
- git.kernel.orgstable/c/da83ed350e4604b976e94239b08d8e2e7eaee7eaeuvd, Patch
- git.kernel.orgstable/c/1543418e82789cc383cd36d41469983c64e3fc7feuvd, Patch
- git.kernel.orgstable/c/996ce839606afd0fef91355627868022aa73eb68euvd, Patch
- git.kernel.orgstable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861euvd, Patch
- git.kernel.orgstable/c/57a9b7fe61031f30c90d20c898160c397f6abe9feuvd
Changes to this CVE
Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).
Record modifiedLinux
New references:- https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f
- https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861
- https://git.kernel.org/stable/c/57a9b7fe61031f30c90d20c898160c397f6abe9f
- https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68
and 1 more reference
Show 14 original changes
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2024/26xxx/CVE-2024-26866.json">CVE-2024-26866</a>Reference added —https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7fReference added —https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861Reference added —https://git.kernel.org/stable/c/57a9b7fe61031f30c90d20c898160c397f6abe9fReference added —https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68Reference added —https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7eaReference removed https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f—Reference removed https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861—Reference removed https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68—Reference removed https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7ea—Reference type removed https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f Types: Patch—Reference type removed https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861 Types: Patch—Reference type removed https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68 Types: Patch—Reference type removed https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7ea Types: Patch—Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Record modifiedCVE Program
New references:Show 12 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7fReference added —https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861Reference added —https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68Reference added —https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7eaReference removed https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f—Reference removed https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861—Reference removed https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68—Reference removed https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7ea—Reference type removed https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f Types: Patch—Reference type removed https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861 Types: Patch—Reference type removed https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68 Types: Patch—Reference type removed https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7ea Types: Patch—Source identifier: af854a3a-2127-422b-91ae-364da2661108
Embed badge
Show the severity and KEV status of this vulnerability on your site – with a link back here. The image is updated hourly.
<a href="https://intel.neosec.eu/en/cve/CVE-2024-26866"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-26866.svg?lang=en" alt="CVE-2024-26866 – NEOSEC Intel" height="20"></a>